[Fedora-packaging] SCL -- buildtime information

[Vít Ondruch]

Dne 8.10.2013 09:36, Jan Kaluža napsal(a):
> On 10/08/2013 07:18 AM, Vít Ondruch wrote:
>> Dne 7.10.2013 22:24, Toshio Kuratomi napsal(a):
>>> * Instead we could build for the main Fedora Repo.  If we do this, the
>>> spec
>>>    file, git repo name, and srpm package name all need to match.  That
>>> means
>>>    we'd have a separate git-level package for each package+scl
>>> combination.
>>>    So if we had scl-php5.6 and we needed a php and php-gettext package
>>> for it
>>>    we'd need separate git-level packages named scl-php5.6-php and
>>>    scl-php5.6-php-gettext.
>>
>> This goes exactly against the basic premise on which SCL were build and
>> that is: "The SCL package must be buildable from the very same .spec
>> file into regular package as well as SCL package.".
>
> I'm not following SCL in Fedora, but even the first way suggested by 
> Toshio is against this basic premise. When you have another .spec file 
> in extra branch, it's not the "very same .spec file"

Different branch does not mean the files are different. It is just 
different branch. You can merge, cherry-pick, etc.

> and I actually don't see any reason why SCL spec file should be 
> buildable as non-SCL package (unless we decide to build them from 
> "very same branch" - meaning that you would have single .spec file in 
> "f19" branch and build it twice - once as SCL and once as normal 
> package). I don't see use-case for this.

There is use case. You have Ruby 1.8.7 in RHEL and you want to build 
Ruby 1.9.3 into EPEL SCL. Ruby 1.9.3 is already available in F18, so the 
only thing you have to do is rebuild it in the proper build root, 
without any change.

>
> I agree it could be easier to maintain the packages this way, but for 
> bigger packages like php it's just lot of extra conditionals which 
> makes the maintenance harder.

Yes, I agree.

>
> If I'm right, this basic premise is SHOULD (not MUST) in current 
> guidelines.

Not sure what is in current guidelines proposal and why, the basic 
premise stays. May be somebody just forgotten history and the reasons.


Vít